Fig. 1

Correlation analysis of the flowering time-related traits in the BA population under different growth conditions. A Correlation analysis of flowering time traits. B Correlation analysis of leaf number traits. The normal distribution maps on the diagonals show the phenotypic distribution of each trait, as indicated. The values above the diagonal line are the pairwise correlation coefficients between the paired traits. The plots below the diagonal line are scatter plots of the compared traits. Significance: *, P ≤ 0.05; **, P ≤ 0.01; ns, not significant. DTH, days to heading; DTS, days to silking; DTA, days to anthesis; LA, number of leaves above the primary ear; LB, number of leaves below the primary ear; TLN, total leaf number. Hn and Hf represent the field trials performed in Hainan and Hefei, respectively, which are two locations in China with distinct climates. The numbers around the figures represent the flowering time (A) and leaf number (B)